J Clin Endocrinol Metab November 2004 PMID 15531486

Vitamin D2 is much less effective than vitamin D3 in humans.

Laura A G Armas, Bruce W Hollis, Robert P Heaney

Mentions

36
Peak: 1 in Nov 2014
across 5 sources since Nov 2014

Extended reach

6,805
potential audience

Total likes

173

Video views

6,804

Mentions per month

Nov 2014 – Jun 2025

Where it's discussed

  • Facebook27 posts
  • News4 articles
  • YouTube2 videos
  • Blogs2 articles
  • X / Twitter1 posts

AI synopsis

What people are saying

This post exemplifies skepticism towards the research by claiming the findings are false and sharing personal health struggles linked to vitamin D, with language that is confrontational and emotional, which diminishes perceived impact but suggests some individual-level engagement.

AgreementStrong disagreement

The post strongly disputes the publication, indicating disagreement with the findings and claiming the study is false.

InterestModerate interest

The discussion shows some curiosity about the topic, especially regarding vitamin D metabolism and health issues.

EngagementLow engagement

The user shares a personal experience and questions the science, indicating some engagement but not deep analysis.

ImpactLow impact

The post dismisses the study's validity, suggesting it has minimal influence on changing perceptions or practices.

Abstract in brief

  • Vitamin D2 is significantly less effective than vitamin D3 in humans, with D2 showing a potency of less than one third of D3 based on serum 25-hydroxyvitamin D levels.
  • Both D2 and D3 are absorbed similarly, but D3 leads to a sustained increase in vitamin D levels over time, while D2 levels decline rapidly after initial elevation.
  • Physicians should be aware that vitamin D2 has a shorter duration of action and lower potency, which may impact its effectiveness in treating vitamin D deficiency.

Top posts

Most liked on X and Bluesky
MandyJ
@BirdsNBeesHoney · X

This study is a absolute lie. The reason D2 seems 1/3 less is bc your body absorbed it & split. The leftovers = 25 hydroxy D3. The last 2 slides I was on d3 only- I was missing a whole hormone & SICK w/ #covid #secondaryhyperparathyroidism #complexhormone https://t.co/WgzfkdpZFy https://t.co/CIi6x1UXF2

Feb 19, 2024 · 1 followers View post →

All mentions

MandyJ
@BirdsNBeesHoney · X

This study is a absolute lie. The reason D2 seems 1/3 less is bc your body absorbed it & split. The leftovers = 25 hydroxy D3. The last 2 slides I was on d3 only- I was missing a whole hormone & SICK w/ #covid #secondaryhyperparathyroidism #complexhormone https://t.co/WgzfkdpZFy https://t.co/CIi6x1UXF2

Feb 19, 2024 · 1 followers View post →